The stench of Koffdon's toxic clouds is particularly abhorred by Rock-type Pokémon. It can fling drill-shaped smog projectiles at foes that seep into their body and leave them badly poisoned.
Its horn, which rotates like a drill, destroys tall buildings with one strike. Getting up close to a Koffdon will give you a chance to observe, through its thin skin, the toxic gases swirling inside.